.ext{
    padding-left:20px;
    background:transparent url(img/app/unknown.jpg) no-repeat scroll left center;
}
.ext-folder{
    background-image:url(img/app/folder.jpg);
}
.ext-doc{
    background-image:url(img/app/doc.jpg);
}
.ext-html,.ext-htm{
    background-image:url(img/app/html.jpg);
}
.ext-txt{
    background-image:url(img/app/txt.jpg);
}
.ext-rar,.ext-zip{
    background-image:url(img/app/rar.jpg);
}
.ext-ppt{
    background-image:url(img/app/ppt.jpg);
}
.ext-xls{
    background-image:url(img/app/xls.jpg);
}
.ext-psd{
    background-image:url(img/app/psd.jpg);
}
.ext-jpg{
    background-image:url(img/app/jpg.jpg);
}
